Following the news that rapper 21 Savage had been detained by ICE (Immigration and Customs Enforcement) for reportedly overstaying his visa, Demi Lovato made light of the sitch over Twitter.

As the news flooded the social media platform, several users posted memes about the shock reveal that the rapper -- who had previously said he was born and raised in Atlanta -- is reportedly a UK citizen.

During the lacklustre Super Bowl game, Demi Lovato tried to get in on the joke, writing on Twitter, "So far 21 savage memes have been my favorite part of the Super Bowl."

It didn't sit well with fans or fellow artists, with many -- including rapper Offset -- who chastised Demi for making light of the serious situation, which could see Savage (real name Sha Yaa Bin Abraham-Joseph) deported from the US.

The singer then tried to defend her comments, saying, "If you're gonna come at me for making a joke, try coming at me with some original not involving drugs," she wrote, referencing the highly-publicised overdose last year which saw her fighting for her life.

Lovato then said in a further message, "F**k Twitter. This is why I don't tweet anymore," before deleting her account.

She also shared screenshots of comments people made to her, including ones poking fun at her former addiction and subsequent overdose.

"Wasn't laughing at anyone getting deported. I know that's not a joke...not have I EVER laughed at that," she wrote. "The meme I posted/was talking about was of him being writing with a feather pen. Sorry if I offended anyone."

She continued, "But it's no excuse to laugh at someone's addiction, let alone their OD."